The goal is to make the test apiserver behave as much as kube-apiserver as
possible. This ensures that tests are as realistic as possible out-of-the-box.
If a test needs a special setup, then that should be visible in the test
because it passes additional flags or options.
One historic deviation from that goal was enabling all API groups. That
change (from 7185624688) gets reverted and tests
which happened to rely on this get updated.
Add two new metrics to monitor the client-go logic that
generate http.Transports for the clients.
- rest_client_transport_cache_entries is a gauge metrics
with the number of existin entries in the internal cache
- rest_client_transport_create_calls_total is a counter
that increments each time a new transport is created, storing
the result of the operation needed to generate it: hit, miss
or uncacheable
Change-Id: I2d8bde25281153d8f8e8faa249385edde3c1cb39
